JPH08146893A - Display device of electronic apparatus - Google Patents

Abstract

PURPOSE: To make it possible to set panel filters at colors having transparency or high lightness and to increase the thickness of the window parts of this panel filter. CONSTITUTION: The projecting parts 42 of a panel sash 33 formed of a non- translucent material are projected forward of the front surface of a light diffusion plate 43 and is set at a height at which projecting parts 45 for regulation formed at a panel filter 26 are partly lapped in a longitudinal direction so that light leakage is prevented by these projecting parts 42. Then, there is no need for coloring the panel filter 26 to a smoke tone and the panel filter is settable at the colors having the transparency or the high lightness. In addition, the window 31, 32 parts of the panel filter 26 are formable thick and the generation of weld lines at the time of molding is sufficiently prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for an electric device having a structure for illuminating a window for display through a light diffusion plate.

[0002]

2. Description of the Related Art A conventional configuration of a display device in an electric device, for example, a microwave oven will be described with reference to FIGS. Of these, FIG. 5 shows a cross-sectional structure of the display device portion of the operation panel of the microwave oven. In FIG. 5, a printed wiring board 2 is arranged behind the panel filter 1 constituting the front surface of the display device so as to face the panel filter 1.

A lamp 3 and a light emitting diode 4 which constitute a light emitting element are arranged on the front side of the printed wiring board 2. Also, on the front side of the printed wiring board 2,
A panel sash 5 having a rib 5a surrounding each lamp 3 is provided, and a holder 6 for preventing the light emitting diode 4 from falling is provided.

A concave portion 7 and a convex portion 8 are provided on the front portion of the panel sash 5 so as to be located between the lamps 3 and 3 and between the lamp 3 and the light emitting diode 4, respectively. In front of each lamp 3, a light diffusing plate 9 is arranged between the convex portions 8 and 8. At the front part of the panel sash 5, the above-mentioned panel filter 1 is arranged so as to cover the light diffusion plate 9 together.

A printed sheet 10 is provided on the front surface of the panel filter 1 by insert molding, and the panel filter 1 is provided with a display window portion 11 at a portion corresponding to the light diffusing plate 9. At the same time (see FIG. 6), a window 12 for display is also provided in a portion corresponding to the light emitting diode 4. On the back side of the panel filter 1,
A partition wall 13 protruding rearward is provided at a portion of the panel sash 5 corresponding to the recess 7.
Is in the recess 7. Further, a reflecting plate 14 is arranged on the surface of each rib 5a on the lamp 3 side.

In the above structure, when the lamp 3 is turned on, the light is diffused by the light diffusion plate 9, and the diffused light illuminates the window 11 from the back side. When the light emitting diode 4 is turned on, the light illuminates the window 12 from the back side.

[0007]

By the way, in the above structure, when the light diffusing plate 9 moves forward (on the left side in FIG. 5), the light diffused by the light diffusing plate 9 is transmitted to the panel filter 1 and the panel sash. There is a risk of leaking from the gap between the first and second sides to the adjacent window portions 11 and 12 side. In order to deal with this, conventionally, in order to provide the partition wall 13 that enters the recess 7 of the panel sash 5 with a light-shielding function, a panel filter 1 that is colored in smoke is used.

However, if the panel filter 1 is colored in a smoke tone, it is necessary to thin the window portions 11 and 12 in order to secure the light transmittance of the window portions 11 and 12 (for example, about 1). .2 mm). If the window portions 11 and 12 are thinly formed in this way, the molten metal around the window portions 11 and 12 is deteriorated when the panel filter 1 is molded. Therefore, as shown in FIG. The line 15 is liable to be generated, and the strength is weakened.

Further, in order to color the panel filter 1 in a smoke tone, it is necessary to manage the color, and when the print sheet 10 is insert-molded on the surface of the panel filter 1, the panel filter 1 and the print sheet are to be molded. There is also a problem that color matching with 10 is difficult.

Further, in the conventional structure, when the reflection plate 14 is not provided on the surface of the rib 5a on the lamp 3 side, the color of the panel sash 5 is changed, for example, the color of the panel sash 5 is from gray to white, and vice versa. Rib 5
The difference in color (a difference in reflectance) of a appears as a difference in brightness of the window 11. Therefore, conventionally, the reflection plate 14 is provided on the surface of the rib 5a on the side of the lamp 3 so that the brightness of the window portion 11 is substantially constant even if the color of the panel sash 5 is changed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to set a panel filter to a transparent or high-luminance color and to thicken the window portion of the panel filter. Therefore, it is another object of the present invention to provide a display device of an electric device which can prevent the generation of weld lines and can eliminate the need for a reflector.

[0012]

A display device for electric equipment according to the present invention includes a wiring board disposed inside a main body of the electric equipment, a light emitting element arranged on the wiring board, and the light emitting element. A housing member provided on the wiring board with a surrounding housing portion, and a panel sash provided on the front portion of the housing member and having a convex portion formed on the front portion at a position surrounding the light emitting element. A light diffusing plate located inside the convex portion of the panel sash located in front of the light emitting element, and a light diffusing plate disposed in front of the panel sash so as to cover the light diffusing plate together. And a panel filter having a window portion for display in a portion corresponding to and a portion provided on the back side of the panel filter and facing the light diffusing plate to restrict forward movement of the light diffusing plate. It has a regulation convex part, The convex portion of the serial panel sashes, the light diffuser plate is projected forward from the front surface of, and is characterized in that the set height of a portion wrapped back and forth with respect to the limiting protrusion.

In this case, the housing member is preferably made of a color having a high reflectance such as white. Further, when a light emitting diode is provided as a light emitting element on the wiring board, it is preferable to integrally provide a holding portion for holding the light emitting diode on the housing member.

[0014]

According to the above-mentioned means, since the light leakage is prevented by the convex portion provided on the panel sash, unlike the conventional construction in which the light leakage is prevented by the partition wall of the panel filter, the panel filter is Does not need to be colored in smoke, and can be set to a transparent or high-brightness color, and the window portion of the panel filter can be made thicker, and weld lines can be prevented from occurring in the window portion. .

By using a highly reflective color such as white for the housing member, regardless of the color of the panel sash,
Since the brightness of the window can be made substantially constant, it is possible to eliminate the need for using a separate reflector. Further, by integrally providing the housing member with the holding portion for holding the light emitting diode, there is no need to separately provide the holding portion, and there is an advantage that the number of parts can be reduced accordingly.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, FIG. 4 shows the appearance of a microwave oven as an electric device. The main body 21 of the microwave oven is configured by forming a heating chamber 23 in an outer case 22, a door 24 for opening and closing the heating chamber 23 is pivotally installed on the front surface, and an operation panel is provided on the right side of the door 24. 25 are provided.

As shown in FIG. 3, a panel filter 26 is provided on the front surface of the operation panel 25, an indicator 27 is provided on the upper portion, and a plurality of manual keys 28 and a start button 29 are provided on the lower portion. Is provided. A print sheet 30 is provided on the front surface of the panel filter 26 by insert molding, and a plurality of display windows 31 and 32 are provided. A part of the panel sash 33 is exposed at the outer peripheral portion of the operation panel 25.

In FIG. 1 showing a sectional view of the operation panel 25, a wiring board 34, which is a printed wiring board, is located inside the main body 21 behind the panel filter 26.
Is provided. On the front surface of the wiring board 34, a lamp 35 is provided as a light emitting element at a portion corresponding to the window 31, and a light emitting diode 36 is provided as a light emitting element at a portion corresponding to the window 32.

A housing member 37 is fixedly provided on the front surface of the wiring board 34. The housing member 37 is integrally provided with a housing portion 38 which individually surrounds the lamp 35 and a holding portion 39 for preventing the light emitting diode 36 from falling down.
A recess 40 is formed in the front part. The housing member 37 is formed of a color having a high reflectance such as white.

A panel sash 33 is arranged at the front of the housing member 37, and a rib 41 provided on the panel sash 33 is inserted into the recess 40 from the front.
The panel sash 33 is formed of a non-translucent material, and a convex portion 42 is integrally provided on the front portion so as to surround the lamp 35 and the light emitting diode 36. At the front part of the lamp 35, a light diffusion plate 43 is arranged inside the convex portion 42.

The panel filter 26 is arranged at the front of the panel sash 33 so as to cover it from the front together with the light diffusing plate 43. On the back side of the panel filter 26, a concave portion 44 is provided at a portion corresponding to the convex portion 42. A regulation convex portion 45 that regulates the forward movement of the light diffusing plate 43 is integrally formed in a portion that is formed and faces the light diffusing plate 43 (a portion corresponding to the window portion 31). in this case,
In the panel filter 26, the thickness of the restricting convex portion 45 is set to about 2.5 mm, and the thickness of the concave portion 44 is set to about 2.0 mm.

Here, the convex portion 42 of the panel sash 33 is
The tip portion is in the recess 44 of the panel filter 26, and as shown in FIG. 2, projects forward from the front surface of the light diffusion plate 43 and in the front-back direction with respect to the restriction protrusion 45. The height is set to wrap a part.

In the above structure, when the lamp 35 is turned on, the light is diffused by the light diffusing plate 43, and the corresponding window portion 31 is illuminated from the back side by the diffused light. When the light emitting diode 36 is turned on, the corresponding window portion 32 is illuminated from the back side by the light.

At this time, the convex portion 42 of the panel sash 33 formed of the non-translucent material projects forward from the front surface of the light diffusion plate 43, and the regulating convex portion 4 of the panel filter 26.
Since the forward movement of the light diffusing plate 43 is regulated by 5, the light diffused by the light diffusing plate 43 is generated by the adjacent window portions 31,
Leakage toward the 32 side can be prevented by the convex portion 42.

According to the embodiment described above, the panel sash 3
Since the light leakage is prevented by the convex portion 42 provided on the panel 3, unlike the conventional configuration in which the light leakage is prevented by the partition wall of the panel filter, the panel filter 26 does not need to be colored in a smoke tone. , It is possible to set the color to be transparent or have a high lightness, and the window portions 31 and 32 of the panel filter 26 can be made thicker, and the weld line can be prevented from occurring in the panel filter 26. Further, since it is not necessary for the panel filter 26 to be colored in a smoke tone, it is possible to easily manage the color and easily match the color with the print sheet 30.

Further, by using a color having a high reflectance such as white for the housing member 37, the panel sash 33 is
Since the brightness of the windows 31 and 32 can be made substantially constant regardless of the color, it is possible to eliminate the need to provide a reflector. In addition, the light emitting diode 36 is attached to the housing member 37.
By integrally providing the holding portion 39 for holding the holding portion, it is not necessary to separately provide the holding portion, and there is an advantage that the number of parts can be reduced accordingly.

The present invention is not limited to a microwave oven,
Of course, it can be applied to electric devices such as rice cookers.

[0028]

According to the display device of the electric device according to the first aspect of the present invention, since the light leakage is prevented by the convex portion provided on the panel sash, the light leakage is prevented by the partition wall of the panel filter. Unlike the conventional configuration to do, it is not necessary to color the panel filter in a smoke tone, and it is possible to set a transparent or high brightness color and to thicken the window portion of the panel filter,
It is possible to prevent a weld line from being generated in the window portion. Moreover, since it is not necessary for the panel filter to be colored in a smoke tone, color management becomes easy.

According to the display device of the electric device of the second aspect, by using a color having a high reflectance such as white for the housing member, the brightness of the window portion is substantially constant regardless of the color of the panel sash. Therefore, there is an advantage that it is possible to eliminate the need for using a reflection plate separately.

According to the display device of the electric device according to the third aspect of the invention, since the housing member is integrally provided with the holding portion for holding the light emitting diode, it is not necessary to separately provide the holding portion, and the number of parts is reduced accordingly. There are advantages.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of essential parts showing an embodiment of the present invention.

FIG. 2 is an enlarged vertical side view of a convex portion of the panel sash.

FIG. 3 is a front view of an operation panel

FIG. 4 is an external perspective view of a microwave oven.

5 is a diagram corresponding to FIG. 1 showing a conventional configuration.

FIG. 6 is a front view of a window portion.

[Explanation of symbols]

21 is a main body, 25 is an operation panel, 26 is a panel filter, 30 is a print sheet, 31 and 32 are windows, 33 is a panel sash, 34 is a wiring board, 35 is a lamp (light emitting element), and 36 is a light emitting diode (light emitting element). Element), 37 is a housing member, 38 is a housing portion, 39 is a holding portion, 42
Is a convex portion, 43 is a light diffusion plate, and 45 is a regulating convex portion.

Claims (3)

[Claims] 1. A wiring board provided on the inside of a main body of an electric device, having a light emitting element arranged on the wiring board, and a housing portion surrounding the light emitting element. A housing member, and a housing member provided at a front portion of the housing member,
A panel sash having a convex portion that surrounds the light emitting element in the front portion, a light diffusing plate located in front of the light emitting element and disposed inside the convex portion of the panel sash, and a panel sash of the panel sash A panel filter which is arranged in the front so as to cover the light diffusing plate and has a window portion for display at a portion corresponding to the light diffusing plate, and which is on the back side of the panel filter and faces the light diffusing plate. And a regulation convex portion that regulates the forward movement of the light diffusion plate, wherein the convex portion of the panel sash projects forward from the front surface of the light diffusion plate, and the regulation convex portion. A display device for an electric device, characterized in that the height is set so as to partially wrap in the front-back direction with respect to the section. 2. The display device for electric equipment according to claim 1, wherein the housing member is made of a color having a high reflectance such as white. 3. The light emitting diode as a light emitting element is disposed on the wiring board, and the housing member is integrally provided with a holding portion for holding the light emitting diode. Display device for electrical equipment.